Experimental investigation and thermodynamic assessment of the Fe-Pr and Fe-Nd binary systems
Experimental investigation and thermodynamic assessment of the Fe-Pr and Fe-Nd binary systems
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Fe-Pr 和 Fe-Nd 二元体系的实验研究和热力学评估
DOI：
10.1016/j.calphad.2016.10.004
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发表时间：
2016-12-01
影响因子：
2.4
通讯作者：
Zhou, H. Y.
中科院分区：
文献类型：
--
作者：
Chen, T. L.;Wang, J.;Zhou, H. Y.
在这项工作中，通过热分析的方法对 Fe-Pr 合金和 Fe-Nd 合金进行了实验研究。测量了 Fe-Pr 和 Fe-Nd 二元体系中的不变反应温度和液相线温度。基于本工作确定的实验结果以及对已发表文献中可用实验数据的严格审查，使用 CALPHAD 方法对 Fe-Pr 和 Fe-Nd 二元系统进行了热力学重新评估。包括液体、bcc、fcc 和 dhcp 在内的溶液相通过替代溶液模型进行建模，并且它们的过剩吉布斯能量用 Redlich-Kister 多项式表示。金属间化合物Fe17Pr2、Fe17Nd2和Fe17Nd5被视为金属间化合物。最终获得的描述Fe-Pr和Fe-Nd二元体系中各相吉布斯能量的自洽热力学参数可以很好地再现相平衡和热力学数据。
In this work, Fe-Pr alloys and Fe-Nd alloys were investigated experimentally by means of thermal analysis. The temperatures of the invariant reactions and liquidus in the Fe-Pr and Fe-Nd binary systems were measured. Based on the experimental results determined in this work and the critical review of the available experimental data in published literature, the Fe-Pr and Fe-Nd binary systems were re-assessed thermodynamically using the CALPHAD method. The solution phases including liquid, bcc, fcc and dhcp are modeled by the substitutional solution model and their excess Gibbs energies are expressed with the Redlich-Kister polynomial. The intermetallic compounds, Fe17Pr2, Fe17Nd2 and Fe17Nd5 are treated as intermetallic compounds. The self consistent thermodynamic parameters obtained finally to describe the Gibbs energies of various phases in the Fe-Pr and Fe-Nd binary systems can be used to reproduce well the phase equilibria and thermodynamic data.